Closure for collapsible tubes



A ril 18, 1939. G. w. PARVIS CLOSURE FOR GOLLAPSIBLIE TUBES Filed March 26, 1938 4 w 7W9 r6 #w m 6 //A m z 0 ou mm mm \2 W V m nn i m Q/u 1. w %m .//Q./W MW Inventor; ieazye WPaJrz/a's 352352? Patented Apr. 18, 1939 UNITED STATES PATENT OFFICE 2,155,202 CLOSURE FOR COLLAFSIBLE TUBES George W. Parvis, Philadelphia, Pa. Application March 26, 19-38,; Serial No. 198,163 7 cla m (or. arm.

My invention relates to improvements in closures for collapsible tubes adapted for dispensing tooth pastes, shaving creams and the like.

' The object of my invention is to provide a 010- sure for tubes comprising a sliding tubular valve stem provided with aside opening, and adapted to be extended beyond the nozzle of the tube to expose said opening and said stem having novel means for discharging the material at an oblique angle relatively to the axis of the valve stem and away from the nozzle so that the material will not adhere to the latter.

A further object is to provide a closure for a tube comprising a nozzle in the form of a cap and a sliding valve stem having cooperating cutting edgesformed by acute angles of the surfaces of the cap and the stem, arranged for insuring the abrupt and clean cutting off of the material when the stem enters the bore of the cap.

A- further object is to provide cut-off means for limiting the flow of material, when the valve stem is in the open position.

A- further'object is to construct the closure with a concealed spring for closing the valve stem and provide stops for limiting the movement of the stem, which stops are constructed so that they willprevent the accumulation of the material between their adjacent surfaces, which would otherwise prevent the proper closing of the valve stem.

'A further object is to construct the closure parts so that they may be embodied in a cap and a nozzle of a tube as a unit structure, and also which may be embodied entirely within a cap adapted to be removably attached to any standard tube.

These together with various other novel features of construction and arrangement of the parts, which will be more fully hereinafter described and claimed, constitute my invention.

Referring to the accompanying drawing:

Fig. 1 is an enlarged vertical section of a portion of a tube embodying my invention.

Fig. 2'is a view similar to Fig. 1 showing the valve stem in the open position.

Fig. 3 is a horizontal section on line 3-3 of Fig. 1.

Fig. 4 is an inverted horizontal section on line 44 of Fi 1.

Fig. 5' is an enlarged vertical section of a tube and a removable cap showing my invention embodied within the cap.

In the drawing in which like reference characof the cap and secured to the nipple.

Theouter endof the cap 8 is provided with an axial bore l0 positioned in alignment with the axis of the bore vI I formed through the nipple. A cylindrical valve: stem I2 is slidably mounted in the bore Ht of the cap and has a sliding fit in the bore 1 hot the nipple, which: latter forms a bearing sleeve for the stem l2. 1

The stem t2 isprovided with an annular collar I3; which is engaged by a spring I4, mounted within a recess I5 formed in the cap 8'. The cap has a shoulder l6 which is engaged by the spring 1T4 whichi-tendsto move the stem until the collar I 3 engages the nipple I.

I The stem l2 isholl'ow and isclosed at its inner end-by at plate I8 secured to the stem. Said stem isprovided with inlet openings 20, formedthrough-its-cylindrical wall for the admission of material: fromthe tube 6- to' the axial passage formed through the stem.

- Thesteml2- is provided with a head 22 located at the outer end of the stem. The inner surface of the-head forms a wall 23 which is inclined obliquely to the axis of the stem- The stem 12- has a discharge opening formed through the cyliindri'call wall adjacent to the head. The d-is charge opening is defined by said inclined surface-of the wall 23 and by the walls 25' and 26 of -the stem. The inner surface, or wall 23, of the head ispreferably in the form of a cone 28; having itsapex extending inwardly toward the tube- 6 and located upon the axis ofthe stem.

-Wherr the tube 6 is compressed the material Will-enter and fill the stem l-2 and then force the stemoutwardly against the action of the spring Ht, until the discharge opening 24 is exposed beyond the cap 8. Theinclined, or conical wall 23 will-direct the material from the discharge open ing fl the shape ofaribbon 29, which is extended'in' a line parallel with the surface of the wall 23 and away from the cap 8.

When the stem I2 is moved outwardly, toexpose the. opening 24 beyond the cap, the inlet openings "20 will be closed by the stem entering the nipple 1-, asshown in Fig. 2, in which position the stentand the-nipple form a cut-off for limiting the quantity of material which may be dischargedeachtime the tube 6 is compressed.

-The outer end surface of the head 22 is spherical and formsan acute angle with the inner sur-- face of the" wall 23", thus forming a peripheral knife edge= 31', the diameter of which is coexwith thebore I 0 of the cap, thus forming another knife edge 33.- When the stem 12 is moved into the'bo're of the cap, to the position shown in: Fig; -1 t-he'knife= edges 3| and 33' coact and cut the material clean, without any of the material adhering to the outside of the cap or the head.

The collar I3 is triangular in cross section and is beveled toward the nipple I, forming a beveled surface 35 and reducing the size of the abutting surfaces between the collar l3 and the nipple I, so that in case any material works its way between the nipple and the stem 12 into the recess I5, it will be forced by the beveled surface 35 away from said abutting surfaces and allow the stem to fully enter the bore of the cap, as shown in Fig. l, and properly close the discharge opening 24.

Fig. 5 shows a form of my invention adapted to be embodied entirely within the cap and adapting the cap for use upon any tube having a nipple of standard size. The cap 8a is provided with a screw-thread 38 for detachably mounting it upon a nipple 39 having a screw-thread 40. A bearing sleeve 42 is secured by pressing it into the cap. The stem I2a has a sliding fit within the bore of the sleeve 42. Said stem is open at its inner end to receive material from the nipple 39 of the tube.

Various changes in the construction and arrangement of the parts may be made without departing from my invention.

I claim:

1. A closure for collapsible tubes comprising a discharge member having an axial bore forming a discharge passage from the tube, a tubular valve stem mounted within said bore for sliding movement, a wall closing the outer end of said stem, said stem having a side discharge opening located adjacent to said wall, said wall positioned at an oblique angle relatively to said bore and inclined from the end of the stem adjacent to the tube toward said discharge opening and defining one wall of said opening for directing material through said opening obliquely relatively to said bore.

2. A closure for collapsible tubes comprising a discharge member having an axial bore forming a discharge passage from the tube, a cylindrical valve stem mounted within said bore for sliding movement, said stem having an axial passage communicating with said tube at the inner end of the stem, said stem having a discharge opening formed through its cylindrical surface and located adjacent to the outer end of the stem, an inclined end wall upon the outer end of the stem and defining an obliquely positioned discharge passage connecting said axial passage of the stem with said discharge opening, said obliquely positioned passage being inclined from the inner end of the stem toward the outer end thereof and arranged for directing material through said opening obliquely relatively to said bore.

3. A closure for collapsible tubes comprising a discharge member having an axial bore forming a discharge passage from the tube, a tubular valve stem mounted within said bore for sliding movement, a conical end Wall closing the outer end of said stem, said conical wall having its apex presented inwardly toward said tube, and said stem having a peripheral discharge opening located adjacent to the base of said conical wall.

4. A closure for collapsible tubes comprising a discharge nipple upon said tube, a cap mounted upon said nipple, said cap having an axial bore, a cylindrical tubular valve stem slidably mounted within the bore of the cap, a head closing the outer end of said stem, said stem having a discharge opening formed through its cylindrical wall, said head having a conical inner surface,

a portion of said conical surface extending through said opening and converging with the outer end surface of said head and forming a peripheral knife edge coextensive in diameter with the diameter of the stem, and means tending to urge the stem into the bore of the cap to a position in which said head is within the bore of the cap.

5. A closure for collapsible tubes comprising a a cap having an axial bore, a cylindrical tubular valve stem slidably mounted within said bore, a sleeve secured Within the cap, said sleeve having an axial bore in which the inner end of the stem is slidably mounted, a collar upon the stem, a spring positioned between said collar and the outer end of the cap and arranged for moving the stem into a position to abut the collar against said sleeve, 2. head closing the outer end of the stem, said head having a conical wall positioned with its apex toward the interior of the stem, and said stem having a discharge opening formed through its cylindrical wall and located adjacent to said conical wall and arranged to be closed by the cap when the stem is moved by the spring to a position to abut the collar against said sleeve.

6. A closure for collapsible tubes comprising a discharge member having an axial bore communicating with the tube, a cylindrical tubular valve stem mounted within said bore for sliding movement, a head closing the outer end of said stem, said stem having a discharge opening formed through the cylindrical wall thereof and located adjacent tosaid head, said stem having an inlet opening formed through the cylindrical wall thereof and located adjacent to the inner end of the stem, a spring associated with said member and the stem tending to move the stem toward the tube to a position in which said inlet opening is exposed beyond the inner end of said bore for the entrance of material from the tube into the stem and for closing said discharge opening within the bore, and a plate secured upon the inner end of the stem against which plate material under pressure Within the tube will move the stem against the action of the spring to a position to close said inlet opening within said bore and open said discharge opening beyond said bore.

7. A closure for collapsible tubes comprising a cap mounted upon said tube, a sleeve secured within the cap, said cap and sleeve having an axial bore, a valve stem slidably mounted within said bore, said stem having an axial passage, a head closing the outer end of said passage, a plate upon the stern and closing the inner end of said passage, said stem having an inlet opening formed through the side wall thereof and located adjacent to said plate, said stem having a discharge opening formed through the side wall thereof and located adjacent to said head, a collar upon the stem, a spring mounted within the cap and positioned between the outer end of the cap and said collar tending to move the stem into a position to open said inlet opening and close said discharge opening, and said openings located upon the stem relatively to the sleeve and the cap whereby said inlet opening will be closed by the sleeve and said discharge opening Will be opened beyond the cap when the stem is moved against the action of the spring.

GEORGE W. PARVIS 

